Magnetic disk device and method
The magnetic disk device addresses ATI by using ATI counters to manage data rewriting, optimizing the timing of idle and immediate operations, thus maintaining data readability and reducing performance impact.
US20260088042A1Active Publication Date: 2026-03-26KK TOSHIBA +1
Patent Information
- Authority / Receiving Office
- US · United States
- Patent Type
- Applications(United States)
- Current Assignee / Owner
- Filing Date
- 2025-09-09
- Publication Date
- 2026-03-26
Smart Images
Figure US20260088042A1-D00000_ABST
Abstract
According to one embodiment, a controller is configured to: set an increment amount for each of counters respectively corresponding to storage areas arranged in a radial direction of a magnetic disk; increment a value of a counter by the set increment amount for a storage area in the vicinity according to a write operation of writing data to the magnetic disk; execute, for each storage area, an operation of calculating a remaining number of write times, which is a number of write operations for a vicinity of one storage area that are executable until a value of a counter corresponding to the one storage area reaches a first threshold value, based on an increment amount for the one storage area; and execute a rewrite operation on each storage area in an order according to the remaining number of write times in an idle state.
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Citation Information
Patent Citations
Band rewrites based on error scan counts
US8976478B1